Lamp chimney



1930. R. E. TONGUE, SR ,2

LAMP CHIMNEY Filed April 1'7. 1929 INVENTOR.

A TTORNEY Patented Aug. 5, 1930 UNITED. STATES PATENT oFFrcE' RICHARD n. TONGUE, SR, or PHILADELPHIA,PENNSYLVANIA, ASSIGNOR To R. E.

TONGUE & BROTHERS COMPANY, me, on PHILADELPHIA, IVPENNSYLVANIA, A son- PORATION OF PENNSYLVANIA LAMP CHIMNEY Application filed April 17,

The present invention relates to lamps and more particularly to an improved lamp chimney.

Some of the objects of the present invention are to provide a lamp chimney having an improved top marginal rim; to provide a lamp chimney wherein chipping and breaking of the top rim is practically eliminated; to provide a top rim for alamp chimney capable of supporting a container for heating purposes without breaking under the weight thereof; to provide a lamp chimney with means for supporting a container thereon without obstructing the free circulation of air necessary to keep the lamp burning at its full efficiency; to provide a reinforced, relatively heavy rim as an integral part of a lamp chimney; to provide a novel scalloped rim for a lamp chimney; and to provide other improvements as will hereinafter appear.

In the accompanying drawings Fig. 1 represents a perspective of a lamp embodying one form of the present invention; Fig. 2 represents a side elevation of the top portion of the lamp chimney shown in Fig. 1; Fig. 3 represents a section on line 33 of Fig. 2; and Fig. 4 represents a plan of the chimney.

Referring to the drawings one form of the present invention consists of a lamp 10, here shown as of the oil burning type, having a glass chimney 11 of novel construction, one feature of which makes possible the supporting of a cup 12 or other utensil for bold ing anything to be heated without interfering with the circulation of air to the lamp burner.

For strengthening the top marginal edge of the chimney 11 so that the danger of breaking and chipping of the chimney top is re-. duced to a minimum, a rim 13 several times thicker than the thickness of the body of the chimney is molded as an integral part of the chimney during its manufacture. As here shown this relatively heavy thick circumferential rim 13 increases the outside diameter of the top of the chimney and while having strength as its main attribute in addition enhances the appearance by reason of the flanged effect into which the outwardly flaring neck portion of the chimney merges.

1929. Serial No, 355,705. g l

. As a means for further reinforcing the rim 13 against breaking its outercircumferential face is corrugated by the provision of flutes 14 molded paralleleaoh to-the other and all being generally parallel to the longitudinal axis of the chimney. Since chipping of the marginal top edge'of a lamp chimney takes place transversely with respect to the longitudinal axis of the chimney, this lengthwise fluting becomes an effective obstacle to breaks of this character.

In order to provide uninterrupted circulation of air within the chimney and to prevent choking of the burner when a utensil such as the cup 12 is supported upon the rim 13, a scalloped effect is molded into the rim so that the resulting structure comprises a plurality of upwardly disposed arc-shaped projections 15 spaced by reversely curved recesses 16. For uniformity of appearance the dimensions of the projection 15 and recesses 16 are respectively alike though the number of the projections 15 is relatively small because of the necessity of providing relatively long and deep recesses 16 for the free passage of air when the mouth of the chimney is closed by the cup 12. The number of projections 15 is proportionate to the diameter of the rim 13 and in the construction here shown by way of example there are eight projections 15 to a rim diameter of two and three quarter inches. Thus from Fig. 1 it will be seen with the cup 12 seated upon the projections 15 that the deep and circumferentially elongated recesses 16 provide aggregate area substantially equal to the area of the throat of the lamp chimney and hence the cup forms no obstruction to the free passage of air.

It will now be apparent that a lamp chimney has been devised whereby instead of the usual thin top edge subject to easy breaking and chipping a relatively heavy thick rim head has been provided capable of resisting all the ordinary strains to which a lamp chimney is subjected. Also this head is formed with an edge scallop .the depressions of which are wide and deep in order to form lateral air passages of appreciable size which prevent choking of the lamp flame in case the end of the lamp is covered, for example when a container is placed thereon for heating purposes. This construction is made possible by double crimping the edge in the process of manufacture. Furthermore, by the provision of flutes on the outer circumferential face of the rim bead added strength is given to the construction, While the arrangement of these flutes parallel to the chimney axis enhances the illumination by giving a beautiful and sparkling effect by reason of the differently reflected light rays.

Having thus described my invention, I claim: 15 As a new article of manufacture a lamp chimney having a top rim of greater Width and greater thickness than the thickness of the glass of the chimney, the support face of said rimbeing provided with deep axially 0 disposed scallops and the outer circumferential face having a plurality of radially arranged flutes.

Signed at Philadelphia, county of Philadclphia, State of Pennsylvania, this 12th day 25 of April, 1929.

RICHARD E. TONGUE, SR. 

